Echo Strimmers

[TheDarkLordChinChin]

A friend of mine has an Echo SRM 2621ES and he wants to get a different head for it. Does anyone know what diameter head is one these? 20mm? 24.5mm?
Thanks.

 

[RCBS]

A friend of mine has an Echo SRM 2621ES and he wants to get a different head for it. Does anyone know what diameter head is one these? 20mm? 24.5mm?
Thanks.

Do you mean shaft size? If so, 25mm. The stud size is 10x1.25.